This deck's manabase can easily reach 4 colors. Why would you run Lightning Bolt instead? Swords fixes everything you named, plus Tarmogoyf and Tombstalker. White's acces to Gaddock Teeg is important in a metagame full of TES and/or Ad Nauseum.deck of which I'm sure they appear in tournaments the coming weeks.

A couple of month ago, I've had some succes with a controllish list: 4 StP, 4 Thoughtseize, 3 Cabal Therapy and 3 Pernicious Deed. This let you laugh at any sort of aggro. Combo isn't that hard with 8 discard (the 4th Therapy on side) and 3 Gaddocks. Pernicious Deed and StP fixes every problem you might encounter with Threshold, if you played a discardspell before.

You might have noticed this takes a lot of slots, so I ran less silver bullets, just going for the 4 BoP, 4 Goyf, 2 Incarnations, 1 Squee, Rofellos, Ranger, 1 Shiekmaw, 2 Slivers (these pretty sucked), 1 Magus and some Witnesses.

I would leave the slivers now, just running one Wickerbough Elder.

I guess it's a different view on the case: just clearing problems with discard or removal instead of some fancy critter that requires a online survival.